Q&A - P5 Math

[Essential]

Any one here can help me with this…

Q16 from Ai Tong Paper
Agnes made some fruit pies. She gave some of them to her neighbour and collected $14.40 after selling 3/5 of the remaining pies for $1.20 each. She then had 1/5 of the original number of fruit pies left. How many fruit pies did she give her neighbour?

[MathIzzzFun]

Essential:

Any one here can help me with this....

Q16 from Ai Tong Paper
Agnes made some fruit pies. She gave some of them to her neighbour and collected $14.40 after selling 3/5 of the remaining pies for $1.20 each. She then had 1/5 of the original number of fruit pies left. How many fruit pies did she give her neighbour?

Hi

Total = number given to neighbour + number remaining

3/5 of number remaining = 14.40/1.20 = 12
number remaining = 12/3 x 5 = 20
2/5 of number remaining = 2/5 x 20 = 8 = 1/5 of total
Total = 5 x 8 = 40
Number given to neighbour = 40 - 20 = 20

cheers.

[Herbie]

Essential:

Any one here can help me with this....

Q16 from Ai Tong Paper
Agnes made some fruit pies. She gave some of them to her neighbour and collected $14.40 after selling 3/5 of the remaining pies for $1.20 each. She then had 1/5 of the original number of fruit pies left. How many fruit pies did she give her neighbour?

14.4/1.20= 12

Please draw model
3u =12
5u=20
2u=8

1/5 =8
5/5 =40

40-20=20
He gave away 20

[Essential]

Thank u Herbie

[Herbie]

Essential:

Thank u Herbie

No worries

[BlueBells]

Hi,


Need help with this question:

The ratio of John’s card to Peter’s cards was 3:4. After John bought another 9 cards and Peter lost 18 cards, the ratio became 3:2. Find the total number of cards John and Peter had at first.

TIQ.

[elkniwt]

Hi BlueBells,


I get my dd to do it : see her working
http://i52.tinypic.com/3135ff4.jpg\">

[note : difficult to type cos the spaces all eaten up, so we use word to draw her model and table]

Hope it is clear.

BlueBells:

Hi,

Need help with this question:

The ratio of John's card to Peter's cards was 3:4. After John bought another 9 cards and Peter lost 18 cards, the ratio became 3:2. Find the total number of cards John and Peter had at first.

TIQ.

[BlueBells]

Hi elkniwt,


Thanks, but I still can’t understand it…probably needs some explanation by the side.

Question :
Why do we need to multiply by 2 and 3 respectively?

Thanks.

[Herbie]

it also can be written as


3u +9=3p - eqn 1
4u-18=2p - eqn 2

Try to make the p common
6u+18=6p
12u-54=6p

Hence 6u+18=12u-54

[BlueBells]

Thanks Herbie.


Now it all makes sense.